6. The underlined word “it” in Step 4 refers to ____.
A. little Lego
B. the fun nature
C. the strength of fingers
D. Lego building
5. All the following steps can make one’s fingers stronger EXCEPT ____.
A. Step4
B. Step3
C. Step2
D. Step1
4. Which should be the title of the passage?
A. Early Chinese immigrants in America
B. Dream to strike it rich
C. The difference between men and women
D. Gold miners in America
(二)
Typing Success in 20 Minutes a Day
- Teaching Your K-12 Students to Type in 20 Minutes a Day
Typing is fast becoming an important skill in our world. Making this skill available to your students is very important. Just 20 minutes of the following activities per day will give your students the finger strength and keyboard knowledge they need to be ready to include typing in their learning programs.
Step 1 Knitting (编织): You can try various styles until you find the one that best suits your students’ abilities. Finger knitting is a great way to start! It helps students focus on finger strength. Knitting with needles is a little more challenging but will suit some older students. The more practice the fingers get the stronger they will become.
Step 2 Key board games: It helps your students become familiar with the keyboard. Students as young as four years old can practice finger placement, letter sounds and names using the keyboard of computers.
Step 3 Clay modeling: Many children develop the ability to be quick and skilful with their hands through creating clay models. The creative nature of this activity keeps children engaged for long periods of time. It helps keep fingers strong and supple.
Step 4 Lego (拼装玩具) building: Little fingers become strong when children pull apart little Lego time and time again. Because of the fun nature of this activity it helps build and does a lot to reinforce the ability to arrange things into an order - another important aspect in typing.
Choose an age-appropriate, interactive and engaging typing program. All students are different and with firm finger skills typing can be easily learned in 20 minutes a day with the use of a mixture of these different approaches.
3. Which of the following was NOT mentioned in the passage?
A. Some Chinese became drivers.
B. Many Chinese opened shops to help wash clothes.
C. Many Chinese picked gold around the old mines.
D. Many Chinese returned to China by the end of the 1850s.
2. The underlined word “resented” mean “________”.
A. liked
B. helped
C. hated
D. served
1. Why did Chinese go to America in the mid-1800s?
A. Because they could find good jobs there.
B. Because they had found gold there.
C. Because they could open laundries and restaurants there.
D. Because they heard there was gold there.
17.(14分)(1)
(2)由S=v0t和
得S=2R,
即水平距离与场强大小E无关,
大小为2R,得证。
16.(14分)
解:
(1)将F沿水平方向、竖直方向分解。
冰块受的支持力F=mg+Fsin37,(2分)
摩檫力F=μF (2分)
在前一阶段,对冰块由动能定理得
–(Fcos37+ F)x= m v-m v(2分)
联立以上各式,并将x=4.00m等数据代入,解出v=1.00m/s (2分)
(2)冰块做类平抛运动,沿x轴方向
x= vt=10.0m (2分)
沿y轴方向,由牛顿第二定律:
a=,y=at (2分)
联立解得y=52.1m>5m,故冰块碰不到仪器室。 (2分)
15.(6分)
① ②
14.解:(1)刹车前卡车的速度
m/s=9m/s>30km/h ①
故该车超速。 ②
(2)刹车过程所用时间
=1.3s ③
(3)平均速度m/s ④
评分标准:
本题共8分,其中①-④各2分。
15.解:不正确。平行于斜面的皮带对圆柱体也有力的作用。①
(1)式应改为:Fcosβ+F=mgsinα ②
由②得
30N=10N ③
将③代入②得
FN=mgcosα-Fsinβ=30×0.8-10×0.6N=18N ④
评分标准:
本题共10分,其中①4分,②③④各2分。
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